1  1839 130 EFFECTS OF PRENATAL NICOTINE EXPOSURE ON HEPATIC GLUCOSE AND LIPID METABOLISM IN OFFSPRING RATS AND ITS HEREDITABILITY. PRENATAL NICOTINE EXPOSURE (PNE) COULD INDUCE AN INCREASED SUSCEPTIBILITY TO MULTIPLE CHRONIC DISEASES IN ADULT OFFSPRING, THAT MAINLY CAUSED BY INTRAUTERINE MATERNAL GLUCOCORTICOID (GC) OVER-EXPOSURE. WE INVESTIGATED THE CHANGES AND INHERITABILITY OF HEPATIC GLUCOSE AND LIPID METABOLISM CAUSED BY PNE, TO DECIPHER THE POSSIBLE INTRAUTERINE PROGRAMMING MECHANISM. PREGNANT WISTAR RATS WERE ADMINISTERED SUBCUTANEOUSLY WITH 2 MG/KG.D NICOTINE FROM GESTATIONAL DAY (GD) 9 APPROXIMATELY 20, AND SECOND-GENERATION (F2) WERE SET ACCORDING TO THE MATING BETWEEN CONTROL FEMALES AND PNE MALES. THE RESULTS SHOWED THAT SERUM PHENOTYPES AND HEPATIC ENZYMES OF GLUCOSE AND LIPID METABOLISM WERE LOWER IN F1 FETAL RATS OF PNE BUT HIGHER IN THE F1 ADULT RATS. MEANWHILE, THE ACTIVATED STATES OF HEPATIC GLUCOCORTICOID-ACTIVATION SYSTEM, INCLUDING TYPE 1 AND TYPE 2 11BETA-HYDROXYSTEROID DEHYDROGENASES (HSD11B1/2), NUCLEAR RECEPTOR SUBFAMILY 3, GROUP C, MEMBER 1 (NR3C1) AND CCAAT ENHANCER BINDING PROTEIN ALPHA (CEBPA), WERE POSITIVELY CORRELATED WITH SERUM CORTICOSTERONE LEVELS BUT NEGATIVELY CORRELATED WITH THE HISTONE ACETYLATION (H3K27AC) AND EXPRESSION LEVELS OF INSULIN-LIKE GROWTH FACTOR 1 (IGF1) BEFORE AND AFTER BIRTH. FURTHERMORE, SERUM PHENOTYPES AND HEPATIC ENZYMES OF GLUCOSE AND LIPID METABOLISM WERE LOWER IN BOTH F2 FETAL AND ADULT RATS OF PNE, WHICH WERE CONSISTENT WITH THE HEPATIC CHANGES OF GC-IGF1 AXIS AND THE GLUCOCORTICOID-ACTIVATION SYSTEM. IN CONCLUSION, PNE COULD LEAD TO INHERITABLE CHANGES OF HEPATIC GLUCOSE AND LIPID METABOLISM, WHICH ARE RELATED TO THE INTRAUTERINE PROGRAMMING OF GC-IGF1 AXIS INDUCED BY THE GLUCOCORTICOID-ACTIVATION SYSTEM.	2020	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
2  5191  52 PRENATAL DEXAMETHASONE EXPOSURE PROGRAMS THE DECREASED TESTOSTERONE SYNTHESIS IN OFFSPRING RATS BY LOW LEVEL OF ENDOGENOUS GLUCOCORTICOIDS. PRENATAL DEXAMETHASONE EXPOSURE (PDE) CAN DECREASE MATERNAL ENDOGENOUS GLUCOCORTICOID LEVEL AND INDUCE TESTICULAR DYSPLASIA IN MALE OFFSPRING RATS. IN THIS STUDY WE INVESTIGATED LOW LEVEL ENDOGENOUS GLUCOCORTICOID-MEDIATED TESTICULAR DYSPLASIA IN PDE OFFSPRING AND ELUCIDATED THE INTRAUTERINE EPIGENETIC PROGRAMMING MECHANISMS. PREGNANT RATS WERE INJECTED WITH DEXAMETHASONE (0.2 MG.KG(-1).D(-1), SC) ON GESTATIONAL DAY (GD) 9-20. THE OFFSPRING RAT BLOOD AND TESTIS WERE COLLECTED AFTER EUTHANASIA ON GD20, POSTNATAL WEEK (PW) 12 OR PW28. WE SHOWED THAT PDE INDUCED ABNORMAL MORPHOLOGY OF TESTIS AND SIGNIFICANTLY DECREASED THE EXPRESSION OF TESTOSTERONE SYNTHESIS-RELATED GENES AS WELL AS TESTOSTERONE PRODUCTION BEFORE AND AFTER BIRTH. MEANWHILE, SERUM CORTICOSTERONE, THE EXPRESSION AND HISTONE 3 LYSINE 14 ACETYLATION (H3K14AC) OF TESTICULAR INSULIN-LIKE GROWTH FACTOR 1 (IGF1) WERE SIGNIFICANTLY DECREASED. AFTER THE PREGNANT RATS WERE SUBJECTED TO CHRONIC STRESS FOR 2 WEEKS (PW10-12), SERUM CORTICOSTERONE LEVEL WAS INCREASED IN THE ADULT PDE OFFSPRING, AND THE ABOVE-MENTIONED OTHER INDICATORS WERE ALSO IMPROVED. CULTURED LEYDIG CELLS (TM3) WERE TREATED WITH CORTICOSTERONE (62.5-500 NM) IN VITRO. WE SHOWED THAT CORTICOSTERONE CONCENTRATION-DEPENDENTLY INHIBITED GLUCOCORTICOID RECEPTOR ALPHA (GRALPHA) AND MIR-124-3P EXPRESSION, INCREASED HISTONE DEACETYLASE 5 (HDAC5) EXPRESSION, AND DECREASED IGF1 H3K14AC LEVEL AND THE EXPRESSION OF IGF1/STEROIDOGENIC ACUTE REGULATORY PROTEIN (STAR), SUGGESTING THAT CORTICOSTERONE AT LOWER THAN PHYSIOLOGICAL LEVEL (<500 NM) INHIBITED TESTOSTERONE SYNTHESIS BY REDUCING H3K14AC AND THE EXPRESSION LEVEL OF IGF1 THROUGH GRALPHA/MIR-124-3P/HDAC5 PATHWAY. IN CONCLUSION, PDE CAN CAUSE PERSISTENT INHIBITION OF TESTOSTERONE SYNTHESIS BEFORE AND AFTER BIRTH IN THE OFFSPRING RATS BY LOW LEVEL OF ENDOGENOUS GLUCOCORTICOIDS.	2022	
                                                                                                                                                                                                                                                                                                                              
3  3812  57 INTRAUTERINE ENDOGENOUS HIGH GLUCOCORTICOIDS PROGRAM OVARIAN DYSFUNCTION IN FEMALE OFFSPRING SECONDARY TO PRENATAL CAFFEINE EXPOSURE. OVARIAN DYSFUNCTION HAS AN INTRAUTERINE ORIGIN, AND PRENATAL CAFFEINE EXPOSURE (PCE) COULD LEAD TO ABNORMAL FOLLICLE COUNTS IN OFFSPRING AFTER BIRTH. HOWEVER, THE EFFECT OF PCE ON OFFSPRING OVARIAN FUNCTION AND ITS MECHANISM OF INTRAUTERINE PROGRAMMING HAVE NOT BEEN REPORTED THUS FAR. IN THIS STUDY, PREGNANT WISTAR RATS WERE INTRAGASTRICALLY ADMINISTERED CAFFEINE (30 AND 120 MG/KG.D) AT GESTATIONAL DAYS 9-20 (GD9-20). CERTAIN TESTS WERE PERFORMED ON THE BLOOD, OVARIES AND HYPOTHALAMUS OF FEMALE OFFSPRING AT DIFFERENT TIME POINTS. PCE FEMALE OFFSPRING HAD OVARIAN DYSFUNCTION IN ADULTHOOD COMPARED WITH THE CONTROL. FURTHER RESULTS SHOWED THAT IN UTERO OVARIAN MORPHOLOGICAL DEVELOPMENT AND ESTRADIOL SYNTHESIS WERE INHIBITED BUT RAPIDLY INCREASED DURING PUBERTY IN THE PCE GROUP. THE HISTONE 3 LYSINE 27 ACETYLATION (H3K27AC) LEVEL OF THE INSULIN-LIKE GROWTH FACTOR 1 (IGF1) PROMOTER REGION AND ITS EXPRESSION WERE DECREASED IN THE OVARY, WHICH WAS DUE TO EXPOSURE TO HIGH LEVELS OF FETAL BLOOD CORTICOSTERONE, AND THE H3K27AC LEVEL OF IGF1 AND ITS EXPRESSION SHIFTED TO INCREASE AFTER BIRTH WITH A DECREASE IN SERUM CORTICOSTERONE LEVELS. CHRONIC STRESS LED TO INCREASED SERUM CORTICOSTERONE LEVELS IN ADULT OFFSPRING, WHEREAS OVARIAN MORPHOLOGICAL DEVELOPMENT, THE H3K27AC LEVEL OF IGF1 AND ITS EXPRESSION, AND ESTRADIOL SYNTHESIS WERE SIGNIFICANTLY INHIBITED. MOREOVER, THE ACTIVITY OF THE HYPOTHALAMIC-PITUITARY-OVARIAN (HPO) AXIS WAS INCREASED IN THE EARLY POSTNATAL PERIOD OF PCE OFFSPRING, AND CHRONIC STRESS REVERSED THESE CHANGES. IN THE KGN CELL LINE, IT WAS FOUND THAT CORTISOL COULD PROMOTE THE TRANSLOCATION OF THE GLUCOCORTICOID RECEPTOR (GR) INTO THE NUCLEUS AND UPREGULATE HISTONE DEACETYLASE 10 (HDAC10) TO INHIBIT THE H3K27AC LEVEL OF IGF1 AND ITS EXPRESSION AND ESTRADIOL SYNTHESIS. IN SUMMARY, PCE IS ASSOCIATED WITH OVARIAN DYSFUNCTION IN FEMALE ADULT OFFSPRING, AND THE POTENTIAL MECHANISM IS RELATED TO INTRAUTERINE HIGH GLUCOCORTICOID EXPOSURE BY ACTIVATING THE GR AND RECRUITING HDAC10 TO AFFECT OVARIAN GLUCOCORTICOID-IGF1 AXIS PROGRAMMING AND TO INHIBIT ESTRADIOL SYNTHESIS.	2021	
                                                                                    
4  2077  38 EPIGENETIC DISRUPTION OF PLACENTAL GENES BY CHRONIC MATERNAL CAFETERIA DIET IN RATS. MATERNAL DIET HAS IMPACT ON REPRODUCTION, FETAL DEVELOPMENT AND OFFSPRING BEHAVIOR, ALTHOUGH MOLECULAR MECHANISMS REMAINED UNKNOWN. OUR AIMS WERE TO ASSESS (1) THE EFFECTS OF A CAFETERIA (CAF) DIET (WESTERN DIET HABITS) ON FEMALE REPRODUCTIVE PERFORMANCE, FETAL AND PLACENTAL PARAMETERS ON GESTATIONAL DAY 21 AND LITTER SIZE AND PUP WEIGHT AT BIRTH; AND (2) PLACENTAL MESSENGER RNA (MRNA) EXPRESSION AND EPIGENETIC REGULATION OF INSULIN-LIKE GROWTH FACTOR (IGF) AND VASCULAR ENDOTHELIAL GROWTH FACTOR (VEGF) AND THEIR RECEPTORS. FEMALE WISTAR RATS WERE FED WITH CONTROL OR CAF DIET FROM WEANING UNTIL PARTURITION. AT WEEK 14 AFTER DIETS STARTED, FEMALES WERE MATED AND HALF OF THE ANIMALS WERE EUTHANIZED ON GESTATIONAL DAY 21 TO EVALUATE REPRODUCTIVE PARAMETERS INCLUDING THE PREGNANCY RATE, NUMBER OF CORPORA LUTEA, IMPLANTATION SITES AND RESORPTION SITES. MOREOVER, FETAL WEIGHT AND LENGTH, PLACENTAL WEIGHT, AND PLACENTAL INDEX WERE RECORDED. PLACENTAS WERE COLLECTED FOR MRNA QUANTIFICATION AND DNA METHYLATION ANALYSIS. THE REMAINING ANIMALS WERE ALLOWED TO GIVE BIRTH AND THE NUMBER AND WEIGHT OF THE PUPS WERE EVALUATED. CAF DIET DID NOT AFFECT REPRODUCTIVE PERFORMANCE OR FETAL WEIGHT AND LENGTH. HOWEVER, CAF-FED ANIMALS SHOWED A DECREASE IN PLACENTAL WEIGHT AND INDEX AND THE PUPS EXHIBITED A LOW BIRTH WEIGHT. ADDITIONALLY, WE FOUND AN UPREGULATION OF IGF2 AND A DOWN REGULATION OF VEGF PLACENTAL MRNA EXPRESSION IN CAF DAMS, ASSOCIATED WITH METHYLATION STATUS CHANGES OF THEIR PROMOTERS. WE CONCLUDE THAT FEMALE CHRONIC CAF DIET CONSUMPTION IMPAIRS FETO-PLACENTAL DEVELOPMENT AND COULD BE EXPLAINED BY AN EPIGENETIC DISRUPTION OF IGF AND VEGF SYSTEMS.	2022	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
5  4095  36 MATERNALLY DERIVED LOW GLUCOCORTICOID MEDIATES ADRENAL DEVELOPMENTAL PROGRAMMING ALTERATION IN OFFSPRING INDUCED BY DEXAMETHASONE. ADVERSE ENVIRONMENTS DURING PREGNANCY CAN INCREASE SUSCEPTIBILITY TO CHRONIC DISEASES IN ADULT OFFSPRING. THE OCCURRENCE AND DEVELOPMENT OF FETAL-ORIGINATED DISEASES WERE ASSOCIATED WITH ADRENAL DEVELOPMENTAL PROGRAMMING AND HOMEOSTASIS ALTERATION IN OFFSPRING. DEXAMETHASONE IS WIDELY USED FOR PRETERM DELIVERY-RELATED PREGNANCY DISEASES, BUT THE INTRAUTERINE PROGRAMMING ALTERATION AND ITS OCCURRENCE MECHANISM OF PRENATAL DEXAMETHASONE EXPOSURE (PDE) ON ADRENAL DEVELOPMENT IN OFFSPRING HAVE NOT BEEN CLARIFIED. IN THIS STUDY, PRENATAL DEXAMETHASONE THERAPY COULD INHIBIT NEONATAL DEVELOPMENT AND CAUSE A LOW EXPOSURE OF MATERNALLY DERIVED GLUCOCORTICOID IN CLINIC. THEN, WE ESTABLISHED A RAT MODEL OF PDE AND OBSERVED A SIMILAR PHENOMENON. FURTHER, THE ADRENAL STEROIDOGENIC FUNCTION WAS CONTINUOUSLY INHIBITED IN THE PDE MALE OFFSPRING RATS, ACCOMPANIED BY THE DECREASED H3K27AC LEVEL OF ADRENAL INSULIN-LIKE GROWTH FACTOR 1 (IGF1) AND ITS EXPRESSION. MOREOVER, CHRONIC STRESS IN PDE ADULT OFFSPRING RATS COULD REVERSE THE CHANGES OF THE ABOVE INDICATORS THROUGH THE HIGH LEVEL OF GLUCOCORTICOID. IN COMBINATION WITH IN VIVO, IN VITRO AND A SERIES OF INTERFERENCE EXPERIMENTS, WE CONFIRMED THAT THE LOW LEVEL OF ENDOGENOUS GLUCOCORTICOIDS INHIBITED THE ADRENAL IGF1 EXPRESSION AND STEROIDOGENIC FUNCTION THROUGH THE GRALPHA/MIR-370-3P/SIRT3 PATHWAY. IN SUMMARY, PDE COULD CONTINUOUSLY INHIBIT THE ADRENAL STEROIDOGENIC FUNCTION IN THE MALE OFFSPRING, WHICH IS ASSOCIATED WITH THE MATERNALLY DERIVED LOW GLUCOCORTICOID-MEDIATED THE ADRENAL DEVELOPMENTAL PROGRAMMING ALTERATION IN OFFSPRING. THIS STUDY PROVIDES A THEORETICAL AND EXPERIMENTAL BASIS FOR EXPLAINING THE ADRENAL DEVELOPMENT ORIGIN OF PDE-INDUCED ADULT CHRONIC DISEASES.	2021	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
6  4066  32 MATERNAL AND PATERNAL PERICONCEPTIONAL NUTRITION AS AN INDICATOR OF OFFSPRING METABOLIC SYNDROME RISK IN LATER LIFE THROUGH EPIGENETIC IMPRINTING: A SYSTEMATIC REVIEW. AIMS: THIS REVIEW EXAMINED WHETHER MATERNAL AND PATERNAL PERICONCEPTIONAL NUTRITION EFFECTS AN OFFSPRING'S LIKELIHOOD OF DEVELOPING CHRONIC METABOLIC RELATED CONDITIONS DUE TO EPIGENETIC IMPRINTING. METHODS: A LITERATURE SEARCH WAS CONDUCTED IN MULTIPLE SCIENCE DATABASES AND LIMITED TO STUDIES PUBLISHED AFTER 2012, IN ENGLISH LANGUAGE AND PEER REVIEWED. THE DATA FROM SELECTED ARTICLES WERE EXTRACTED AND A QUALITATIVE APPROACH WAS EMPLOYED DUE TO HETEROGENEITY OF RESULTS. RESULTS: NEWBORNS FROM OBESE FATHERS SHOWED ALTERED METHYLATION OVERALL AND SIGNIFICANT HYPOMETHYLATION AT THE INSULIN-LIKE GROWTH FACTOR 2 (IGF2) GENE. HIGH MATERNAL PRE-PREGNANCY BODY MASS INDEX (BMI) WAS ASSOCIATED WITH ALTERED OFFSPRING DNA METHYLATION LEVELS AND GESTATIONAL DIABETES MELLITUS INDUCED SIGNIFICANTLY INCREASED METHYLATION LEVELS IN OFFSPRING. GESTATIONAL WEIGHT GAIN WAS NOT ASSOCIATED WITH DIFFERENTIALLY METHYLATED CORD BLOOD. BIRTH WEIGHT WAS HIGHER IN OFFSPRING EXPOSED TO FAMINE IN EARLY GESTATION. OFFSPRING BORN POST MATERNAL BARIATRIC SURGERY SHOWED A LOWER PERCENTAGE OF BODY FAT AND IMPROVED FASTING INSULIN LEVELS COMPARED TO SIBLINGS BORN PRE-MATERNAL BARIATRIC SURGERY. CONCLUSIONS: THE AVAILABLE EVIDENCE SUGGESTS THAT POOR MATERNAL AND PATERNAL PERICONCEPTIONAL NUTRITION CAN INCREASE THE RISK OF METABOLIC SYNDROME IN OFFSPRING, THROUGH EPIGENETIC IMPRINTING. POTENTIAL PARENTS SHOULD BE ADVISED THAT MAINTAINING A HEALTHY DIET AND BMI IS LIKELY TO REDUCE THE RISK OF METABOLIC SYNDROME IN OFFSPRING.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
7   520  26 ASSOCIATIONS BETWEEN MATERNAL PRENATAL STRESS, METHYLATION CHANGES IN IGF1 AND IGF2, AND BIRTH WEIGHT. MATERNAL STRESS HAS BEEN LINKED TO LOW BIRTH WEIGHT IN NEWBORNS. ONE POTENTIAL PATHWAY INVOLVES EPIGENETIC CHANGES AT CANDIDATE GENES THAT MAY MEDIATE THE EFFECTS OF PRENATAL MATERNAL STRESS ON BIRTH WEIGHT. THIS RELATIONSHIP HAS BEEN DOCUMENTED IN STRESS-RELATED GENES, SUCH AS NR3C1. THERE IS LESS LITERATURE EXPLORING THE EFFECT OF STRESS ON GROWTH-RELATED GENES. IGF1 AND IGF2 HAVE BEEN IMPLICATED IN FETAL GROWTH AND DEVELOPMENT, THOUGH VIA DIFFERENT MECHANISMS AS IGF2 IS UNDER IMPRINTING CONTROL. IN THIS STUDY, WE TESTED FOR ASSOCIATIONS BETWEEN PRENATAL STRESS, METHYLATION OF IGF1 AND IGF2, AND BIRTH WEIGHT. A TOTAL OF 24 MOTHER-NEWBORN DYADS IN THE DEMOCRATIC REPUBLIC OF CONGO WERE ENROLLED. ETHNOGRAPHIC INTERVIEWS WERE CONDUCTED WITH MOTHERS AT DELIVERY TO GATHER CULTURALLY RELEVANT WAR-RELATED AND CHRONIC STRESSORS. DNA METHYLATION DATA WERE GENERATED FROM MATERNAL VENOUS, CORD BLOOD AND PLACENTAL TISSUE SAMPLES. MULTIVARIATE REGRESSIONS WERE USED TO TEST FOR ASSOCIATIONS BETWEEN STRESS MEASURES, DNA METHYLATION AND BIRTH WEIGHT IN EACH OF THE THREE TISSUE TYPES. WE FOUND AN ASSOCIATION BETWEEN IGF2 METHYLATION IN MATERNAL BLOOD AND BIRTH WEIGHT. PREVIOUS LITERATURE ON THE RELATIONSHIP BETWEEN IGF2 METHYLATION AND BIRTH WEIGHT HAS FOCUSED ON METHYLATION AT KNOWN DIFFERENTIALLY METHYLATED REGIONS IN CORD BLOOD OR PLACENTAL SAMPLES. OUR FINDINGS INDICATE THERE MAY BE LINKS BETWEEN THE MATERNAL EPIGENOME AND LOW BIRTH WEIGHT THAT RELY ON MECHANISMS OUTSIDE KNOWN IMPRINTING PATHWAYS. IT THUS MAY BE IMPORTANT TO CONSIDER THE EFFECT OF MATERNAL EXPOSURES AND EPIGENETIC PROFILES ON BIRTH WEIGHT EVEN IN THE SETTING OF MATERNALLY IMPRINTED GENES SUCH AS IGF2.	2018	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
8   518  30 ASSOCIATIONS BETWEEN ANTIBIOTIC EXPOSURE DURING PREGNANCY, BIRTH WEIGHT AND ABERRANT METHYLATION AT IMPRINTED GENES AMONG OFFSPRING. OBJECTIVES: LOW BIRTH WEIGHT (LBW) HAS BEEN ASSOCIATED WITH COMMON ADULT-ONSET CHRONIC DISEASES, INCLUDING OBESITY, CARDIOVASCULAR DISEASE, TYPE II DIABETES AND SOME CANCERS. THE ETIOLOGY OF LBW IS MULTI-FACTORIAL. HOWEVER, RECENT EVIDENCE SUGGESTS EXPOSURE TO ANTIBIOTICS MAY ALSO INCREASE THE RISK OF LBW. THE MECHANISMS UNDERLYING THIS ASSOCIATION ARE UNKNOWN, ALTHOUGH EPIGENETIC MECHANISMS ARE HYPOTHESIZED. IN THIS STUDY, WE EVALUATED THE ASSOCIATION BETWEEN MATERNAL ANTIBIOTIC USE AND LBW AND EXAMINED THE POTENTIAL ROLE OF ALTERED DNA METHYLATION THAT CONTROLS GROWTH REGULATORY IMPRINTED GENES IN THESE ASSOCIATIONS. METHODS: BETWEEN 2009-2011, 397 PREGNANT WOMEN WERE ENROLLED AND FOLLOWED UNTIL DELIVERY. PRENATAL ANTIBIOTIC USE WAS ASCERTAINED THROUGH MATERNAL SELF-REPORT. IMPRINTED GENES METHYLATION LEVELS WERE MEASURED AT DIFFERENTIALLY METHYLATED REGIONS (DMRS) USING BISULFITE PYROSEQUENCING. GENERALIZED LINEAR MODELS WERE USED TO EXAMINE ASSOCIATIONS AMONG ANTIBIOTIC USE, BIRTH WEIGHT AND DMR METHYLATION FRACTIONS. RESULTS: AFTER ADJUSTING FOR INFANT GENDER, RACE/ETHNICITY, MATERNAL BODY MASS INDEX, DELIVERY ROUTE, GESTATIONAL WEIGHT GAIN, GESTATIONAL AGE AT DELIVERY, FOLIC ACID INTAKE, PHYSICAL ACTIVITY, MATERNAL SMOKING AND PARITY, ANTIBIOTIC USE DURING PREGNANCY WAS ASSOCIATED WITH 138 G LOWER BIRTH WEIGHT COMPARED WITH NON-ANTIBIOTIC USE (BETA-COEFFICIENT=-132.99, S.E.=50.70, P=0.008). THESE ASSOCIATIONS WERE STRONGEST IN NEWBORNS OF WOMEN WHO REPORTED ANTIBIOTIC USE OTHER THAN PENICILLINS (BETA-COEFFICIENT=-135.57, S.E.=57.38, P=0.02). METHYLATION AT FIVE DMRS, IGF2 (P=0.05), H19 (P=0.15), PLAGL1 (P=0.01), MEG3 (P=0.006) AND PEG3 (P=0.08), WAS ASSOCIATED WITH MATERNAL ANTIBIOTIC USE; AMONG THESE, ONLY METHYLATION AT THE PLAGL1 DMR WAS ALSO ASSOCIATED WITH BIRTH WEIGHT. CONCLUSION: WE REPORT AN INVERSE ASSOCIATION BETWEEN IN UTERO EXPOSURE TO ANTIBIOTICS AND LOWER INFANT BIRTH WEIGHT AND PROVIDE THE FIRST EMPIRICAL EVIDENCE SUPPORTING IMPRINTED GENE PLASTICITY IN THESE ASSOCIATIONS.	2013	
                                                                                                                                                                    
9  5090  30 PLACENTAL ADIPONECTIN GENE DNA METHYLATION LEVELS ARE ASSOCIATED WITH MOTHERS' BLOOD GLUCOSE CONCENTRATION. GROWING EVIDENCE SUGGESTS THAT EPIGENETIC PROFILE CHANGES OCCURRING DURING FETAL DEVELOPMENT IN RESPONSE TO IN UTERO ENVIRONMENT VARIATIONS COULD BE ONE OF THE MECHANISMS INVOLVED IN THE EARLY DETERMINANTS OF ADULT CHRONIC DISEASES. IN THIS STUDY, WE TESTED WHETHER MATERNAL GLYCEMIC STATUS IS ASSOCIATED WITH THE ADIPONECTIN GENE (ADIPOQ) DNA METHYLATION PROFILE IN PLACENTA TISSUE, IN MATERNAL CIRCULATING BLOOD CELLS, AND IN CORD BLOOD CELLS. WE FOUND THAT LOWER DNA METHYLATION LEVELS IN THE PROMOTER OF ADIPOQ ON THE FETAL SIDE OF THE PLACENTA WERE CORRELATED WITH HIGHER MATERNAL GLUCOSE LEVELS DURING THE SECOND TRIMESTER OF PREGNANCY (2-H GLUCOSE AFTER THE ORAL GLUCOSE TOLERANCE TEST; R(S) </= -0.21, P < 0.05). LOWER DNA METHYLATION LEVELS ON THE MATERNAL SIDE OF THE PLACENTA WERE ASSOCIATED WITH HIGHER INSULIN RESISTANCE INDEX (HOMEOSTASIS MODEL ASSESSMENT OF INSULIN RESISTANCE) DURING THE SECOND AND THIRD TRIMESTERS OF PREGNANCY (R(S) </= -0.27, P < 0.05). FINALLY, LOWER DNA METHYLATION LEVELS WERE ASSOCIATED WITH HIGHER MATERNAL CIRCULATING ADIPONECTIN LEVELS THROUGHOUT PREGNANCY (R(S) </= -0.26, P < 0.05). IN CONCLUSION, THE ADIPOQ DNA METHYLATION PROFILE WAS ASSOCIATED WITH MATERNAL GLUCOSE STATUS AND WITH MATERNAL CIRCULATING ADIPONECTIN CONCENTRATION. BECAUSE ADIPONECTIN IS SUSPECTED TO HAVE INSULIN-SENSITIZING PROPRIETIES, THESE EPIGENETIC ADAPTATIONS HAVE THE POTENTIAL TO INDUCE SUSTAINED GLUCOSE METABOLISM CHANGES IN THE MOTHER AND OFFSPRING LATER IN LIFE.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
10  2149  24 EPIGENETIC MARKERS TO PREDICT CONVERSION FROM GESTATIONAL DIABETES TO TYPE 2 DIABETES. CONTEXT: LIFESTYLE FACTORS MEDIATE EPIGENETIC CHANGES THAT CAN CAUSE CHRONIC DISEASES. ALTHOUGH ANIMAL AND LABORATORY STUDIES LINK EPIGENETIC CHANGES TO DIABETES, EPIGENETIC INFORMATION IN WOMEN WITH GESTATIONAL DIABETES (GDM) AND TYPE 2 DIABETES IS LACKING. OBJECTIVE: THIS STUDY SOUGHT TO MEASURE EPIGENETIC MARKERS ACROSS PREGNANCY AND EARLY POSTPARTUM AND IDENTIFY MARKERS THAT COULD BE USED AS PREDICTORS FOR CONVERSION FROM GDM TO TYPE 2 DIABETES. DESIGN: GLOBAL HISTONE H3 DIMETHYLATION WAS MEASURED IN WHITE BLOOD CELLS AT THREE TIME POINTS: 30 WK GESTATION, 8-10 WK POSTPARTUM, AND 20 WK POSTPARTUM, FROM FOUR GROUPS OF WOMEN WITH AND WITHOUT DIABETES. SETTING AND PARTICIPANTS: A TOTAL OF 39 PARTICIPANTS (SIX TO NINE IN EACH GROUP) WERE RECRUITED INCLUDING: NONDIABETIC WOMEN; WOMEN WITH GDM WHO DEVELOPED POSTPARTUM TYPE 2 DIABETES; WOMEN WITH GDM WITHOUT POSTPARTUM TYPE 2 DIABETES; AND WOMEN WITH TYPE 2 DIABETES. MAIN OUTCOME MEASURE: PERCENTAGES OF DIMETHYLATION OF H3 HISTONES RELATIVE TO TOTAL H3 HISTONE METHYLATION WERE COMPARED BETWEEN DIABETIC/NONDIABETIC GROUPS USING APPROPRIATE COMPARATIVE STATISTICS. RESULTS: H3K27 DIMETHYLATION WAS 50-60% LOWER AT 8-10 AND 20 WK POSTPARTUM IN WOMEN WITH GDM WHO DEVELOPED TYPE 2 DIABETES, COMPARED WITH NONDIABETIC WOMEN. H3K4 DIMETHYLATION WAS 75% LOWER AT 8-10 WK POSTPARTUM IN WOMEN WITH GDM WHO SUBSEQUENTLY DEVELOPED TYPE 2 DIABETES COMPARED WITH WOMEN WHO HAD GDM WHO DID NOT. CONCLUSIONS: THE PERCENTAGE OF DIMETHYLATION OF HISTONES H3K27 AND H3K4 VARIED WITH DIABETIC STATE AND HAS THE POTENTIAL AS A PREDICTIVE TOOL TO IDENTIFY WOMEN WHO WILL CONVERT FROM GDM TO TYPE 2 DIABETES.	2016	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
11  6277  32 THE PATHOGENIC ROLE OF PERSISTENT MILK SIGNALING IN MTORC1- AND MILK-MICRORNA-DRIVEN TYPE 2 DIABETES MELLITUS. MILK, THE SECRETORY PRODUCT OF THE LACTATION GENOME, PROMOTES GROWTH OF THE NEWBORN MAMMAL. MILK DELIVERS INSULINOTROPIC AMINO ACIDS, THUS MAINTAINS A MOLECULAR CROSSTALK WITH THE PANCREATIC BETA-CELL OF THE MILK RECIPIENT. HOMEOSTASIS OF BETA-CELLS AND INSULIN PRODUCTION DEPEND ON THE APPROPRIATE MAGNITUDE OF MTORC1 SIGNALING. MTORC1 IS ACTIVATED BY BRANCHED-CHAIN AMINO ACIDS (BCAAS), GLUTAMINE, AND PALMITIC ACID, ABUNDANT NUTRIENT SIGNALS OF COW S MILK. FURTHERMORE, MILK DELIVERS BIOACTIVE EXOSOMAL MICRORNAS. AFTER MILK CONSUMPTION, BOVINE MICRORNA-29B, A MEMBER OF THE DIABETOGENIC MICRORNA-29- FAMILY, REACHES THE SYSTEMIC CIRCULATION AND THE CELLS OF THE MILK CONSUMER. MICRORNA-29B DOWNREGULATES BRANCHEDCHAIN ALPHA-KETOACID DEHYDROGENASE, A POTENTIAL EXPLANATION FOR INCREASED BCAA SERUM LEVELS, THE METABOLIC SIGNATURE OF INSULIN RESISTANCE AND TYPE 2 DIABETES MELLITUS (T2DM). IN NON-OBESE DIABETIC MICE, MICRORNA-29B DOWNREGULATES THE ANTIAPOPTOTIC PROTEIN MCL-1, WHICH LEADS TO EARLY BETA-CELL DEATH. IN ALL MAMMALS EXCEPT NEOLITHIC HUMANS, MILK-DRIVEN MTORC1 SIGNALING IS PHYSIOLOGICALLY RESTRICTED TO THE POSTNATAL PERIOD. IN CONTRAST, CHRONIC HYPERACTIVATED MTORC1 SIGNALING HAS BEEN ASSOCIATED WITH THE DEVELOPMENT OF AGE-RELATED DISEASES OF CIVILIZATION INCLUDING T2DM. NOTABLY, CHRONIC HYPERACTIVATION OF MTORC1 ENHANCES ENDOPLASMIC RETICULUM STRESS THAT PROMOTES APOPTOSIS. IN FACT, HYPERACTIVATED BETA-CELL MTORC1 SIGNALING INDUCED EARLY BETA-CELL APOPTOSIS IN A MOUSE MODEL. THE EPIC-INTERACT STUDY DEMONSTRATED AN ASSOCIATION BETWEEN MILK CONSUMPTION AND T2DM IN FRANCE, ITALY, UNITED KINGDOM, GERMANY, AND SWEDEN. IN CONTRAST, FERMENTED MILK PRODUCTS AND CHEESE EXHIBIT AN INVERSE CORRELATION. SINCE THE EARLY 1950 S, REFRIGERATION TECHNOLOGY ALLOWED WIDESPREAD CONSUMPTION OF FRESH PASTEURIZED MILK, WHICH FACILITATES DAILY INTAKE OF BIOACTIVE BOVINE MICRORNAS. PERSISTENT UPTAKE OF COW S MILK-DERIVED MICRORNAS APPARENTLY TRANSFERS AN OVERLOOKED EPIGENETIC DIABETOGENIC PROGRAM THAT SHOULD NOT REACH THE HUMAN FOOD CHAIN.	2015	
                                                                                                                                                                  
12  4010  26 LOW MATERNAL ADHERENCE TO A MEDITERRANEAN DIET IS ASSOCIATED WITH INCREASE IN METHYLATION AT THE MEG3-IG DIFFERENTIALLY METHYLATED REGION IN FEMALE INFANTS. DIET IS DICTATED BY THE SURROUNDING ENVIRONMENT, AS FOOD ACCESS AND AVAILABILITY MAY CHANGE DEPENDING ON WHERE ONE LIVES. MATERNAL DIET DURING PREGNANCY IS AN IMPORTANT PART OF THE IN UTERO ENVIRONMENT, AND MAY AFFECT THE EPIGENOME. STUDIES LOOKING AT OVERALL DIET PATTERN IN RELATION TO DNA METHYLATION HAVE BEEN LACKING. THE MEDITERRANEAN DIET IS KNOWN FOR ITS HEALTH BENEFITS, INCLUDING DECREASED INFLAMMATION, WEIGHT LOSS, AND MANAGEMENT OF CHRONIC DISEASES. THIS STUDY ASSESSES THE ASSOCIATION BETWEEN MATERNAL ADHERENCE TO A MEDITERRANEAN DIET PATTERN DURING PREGNANCY AND INFANT DNA METHYLATION AT BIRTH. MEDITERRANEAN DIET ADHERENCE IN EARLY PREGNANCY WAS MEASURED IN 390 WOMEN ENROLLED IN THE NEWBORN EPIGENETIC STUDY, AND DNA METHYLATION WAS ASSESSED IN THEIR INFANTS AT BIRTH. MULTINOMIAL LOGISTIC REGRESSION WAS USED TO ASSESS THE ASSOCIATION BETWEEN ADHERENCE TO A MEDITERRANEAN DIET AND INFANT METHYLATION AT THE MEG3, MEG3-IG, PLEIOMORPHIC ADENOMA GENE-LIKE 1, INSULIN-LIKE GROWTH FACTOR 2 GENE, H19, MESODERM-SPECIFIC TRANSCRIPT, NEURONATIN, PATERNALLY EXPRESSED GENE 3, SARCOGLYCAN AND PATERNALLY EXPRESSED GENE 10 REGIONS, MEASURED BY PYROSEQUENCING. INFANTS OF MOTHERS WITH A LOW ADHERENCE TO A MEDITERRANEAN DIET HAD A GREATER ODDS OF HYPO-METHYLATION AT THE MEG3-IG DIFFERENTIALLY METHYLATED REGION (DMR). SEX-STRATIFIED MODELS SHOWED THAT THIS ASSOCIATION WAS PRESENT IN GIRLS ONLY. THIS STUDY PROVIDES EARLY EVIDENCE ON THE ASSOCIATION BETWEEN OVERALL DIET PATTERN AND METHYLATION AT THE 9 DMRS INCLUDED IN THIS STUDY, AND SUGGESTS THAT MATERNAL DIET CAN HAVE A SEX-SPECIFIC IMPACT ON INFANT DNA METHYLATION AT SPECIFIC IMPRINTED DMRS.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
13  6089  31 THE EFFECTS OF DEPRESSION AND USE OF ANTIDEPRESSIVE MEDICINES DURING PREGNANCY ON THE METHYLATION STATUS OF THE IGF2 IMPRINTED CONTROL REGIONS IN THE OFFSPRING. IN UTERO EXPOSURES TO ENVIRONMENTAL FACTORS MAY RESULT IN PERSISTENT EPIGENETIC MODIFICATIONS AFFECTING NORMAL DEVELOPMENT AND SUSCEPTIBILITY TO CHRONIC DISEASES IN LATER LIFE. WE EXPLORED THE RELATIONSHIP BETWEEN EXPOSURE OF THE GROWING FETUS TO MATERNAL DEPRESSION OR ANTIDEPRESSANTS AND DNA METHYLATION AT TWO DIFFERENTIALLY METHYLATED REGIONS (DMRS) OF THE IMPRINTED INSULIN-LIKE GROWTH FACTOR 2 (IGF2) GENE. ABERRANT DNA METHYLATION AT THE IGF2 AND NEIGHBORING H19 DMRS HAS BEEN ASSOCIATED WITH DEREGULATED IGF2 EXPRESSION, CHILDHOOD CANCERS AND SEVERAL CHRONIC DISEASES DURING ADULTHOOD. OUR STUDY POPULATION IS COMPRISED OF PREGNANT MOTHERS AND THEIR NEWBORNS (N = 436), AS PART OF THE NEWBORN EPIGENETICS STUDY (NEST). A STANDARDIZED QUESTIONNAIRE WAS COMPLETED AND MEDICAL RECORD DATA WERE ABSTRACTED TO ASCERTAIN MATERNAL DEPRESSION AND ANTIDEPRESSIVE DRUG USE. DMR METHYLATION LEVELS IN UMBILICAL CORD BLOOD LEUKOCYTES WERE QUANTIFIED USING PYROSEQUENCING. FROM THE 436 NEWBORNS, LABORATORY DATA WERE OBTAINED FOR 356 INDIVIDUALS AT THE IGF2 DMRS, AND FOR 411 INDIVIDUALS AT THE H19 DMRS; ABOUT HALF OF EACH GROUP WAS AFRICAN AMERICAN OR CAUCASIAN. WHILE OVERALL NO ASSOCIATION BETWEEN DEPRESSION AND METHYLATION PROFILES WAS FOUND, WE OBSERVED A SIGNIFICANT HYPERMETHYLATION OF THE H19 DMRS IN NEWBORNS OF AFRICAN AMERICAN (N = 177) BUT NOT CAUCASIAN (N = 168) MOTHERS WHO REPORTED THE USE OF ANTIDEPRESSIVE DRUGS DURING PREGNANCY (BETA = +6.89, P = 0.01). OF NOTE, OUR DATA REVEAL A RACE-INDEPENDENT ASSOCIATION BETWEEN SMOKING DURING PREGNANCY AND METHYLATION AT THE IGF2 DMR (+3.05%, P = 0.01). IN CONCLUSION, OUR FINDINGS SUGGEST A RACE-DEPENDENT RESPONSE RELATED TO MATERNAL USE OF ANTIDEPRESSANTS AT ONE OF THE IGF2 DMRS IN THE OFFSPRING.	2011	
                                                                                                                                                                                                                                                                                                                                                                                                                       
14  4504  27 MOTHER'S PRE-PREGNANCY BMI AND PLACENTAL CANDIDATE MIRNAS: FINDINGS FROM THE ENVIRONAGE BIRTH COHORT. THERE IS INCREASING EVIDENCE THAT THE PREDISPOSITION FOR DEVELOPMENT OF CHRONIC DISEASES ARISES AT THE EARLIEST TIMES OF LIFE. IN THIS CONTEXT, MATERNAL PRE-PREGNANCY WEIGHT MIGHT MODIFY FETAL METABOLISM AND THE CHILD'S PREDISPOSITION TO DEVELOP DISEASE LATER IN LIFE. THE AIM OF THIS STUDY IS TO INVESTIGATE THE ASSOCIATION BETWEEN MATERNAL PRE-PREGNANCY BODY MASS INDEX (BMI) AND MIRNA ALTERATIONS IN PLACENTAL TISSUE AT BIRTH. IN 211 MOTHER-NEWBORN PAIRS FROM THE ENVIRONAGE BIRTH COHORT, WE ASSESSED PLACENTAL EXPRESSION OF SEVEN MIRNAS IMPORTANT IN CRUCIAL CELLULAR PROCESSES IMPLICATED IN ADIPOGENESIS AND/OR OBESITY. MULTIPLE LINEAR REGRESSION MODELS WERE USED TO ADDRESS THE ASSOCIATIONS BETWEEN PRE-PREGNANCY BMI AND PLACENTAL CANDIDATE MIRNA EXPRESSION. MATERNAL PRE-PREGNANCY BMI AVERAGED (+/-SD) 23.9 (+/-4.1) KG/M(2). IN NEWBORN GIRLS (NOT IN BOYS) PLACENTAL MIR-20A, MIR-34A AND MIR-222 EXPRESSION WAS LOWER WITH HIGHER MATERNAL PRE-PREGNANCY BMI. IN ADDITION, THE ASSOCIATION BETWEEN MATERNAL PRE-PREGNANCY BMI AND PLACENTAL EXPRESSION OF THESE MIRNAS IN GIRLS WAS MODIFIED BY GESTATIONAL WEIGHT GAIN. THE LOWER EXPRESSION OF THESE MIRNAS IN PLACENTA IN ASSOCIATION WITH PRE-PREGNANCY BMI, WAS ONLY EVIDENT IN MOTHERS WITH LOW WEIGHT GAIN (<14 KG). THE PLACENTAL EXPRESSION OF MIR-20A, MIR-34A, MIR-146A, MIR-210 AND MIR-222 MAY PROVIDE A SEX-SPECIFIC BASIS FOR EPIGENETIC EFFECTS OF PRE-PREGNANCY BMI.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
15  2903  30 GENDER-SPECIFIC METHYLATION DIFFERENCES IN RELATION TO PRENATAL EXPOSURE TO CIGARETTE SMOKE. EPIGENETIC ALTERATIONS MAY MECHANISTICALLY EXPLAIN THE DEVELOPMENTAL ORIGINS OF ADULT DISEASE, NAMELY THE HYPOTHESIS THAT MANY COMPLEX ADULT CHRONIC DISEASES ORIGINATE AS A RESULT OF CONDITIONS ENCOUNTERED IN UTERO. IF TRUE, EPIGENETICALLY REGULATED IMPRINTED GENES, CRITICAL TO NORMAL GROWTH AND DEVELOPMENT, MAY PARTIALLY MEDIATE THESE OUTCOMES. WE DETERMINED THE INFLUENCE OF IN UTERO EXPOSURE TO CIGARETTE SMOKING ON METHYLATION AT TWO DIFFERENTIALLY METHYLATED REGIONS (DMRS) REGULATING INSULIN-LIKE GROWTH FACTOR 2 (IGF2) AND H19, AND HOW THIS MIGHT RELATE TO BIRTH WEIGHT OF INFANTS BORN TO 418 PREGNANT WOMEN. SMOKING STATUS WAS ASCERTAINED THROUGH SELF-REPORT AND MEDICAL RECORDS. BISULFITE PYROSEQUENCING WAS USED TO MEASURE METHYLATION IN UMBILICAL CORD BLOOD DNAS. LEAST SQUARES DNA METHYLATION MEANS AT EACH DMR AND BIRTH WEIGHT WERE COMPARED BETWEEN INFANTS OF SMOKERS AND NON-SMOKERS, USING GENERALIZED LINEAR MODELS. WHILE THERE WERE NO SIGNIFICANT DIFFERENCES AT THE H19 DMR, INFANTS BORN TO SMOKERS HAD HIGHER METHYLATION AT THE IGF2 DMR THAN THOSE BORN TO NEVER SMOKERS OR THOSE WHO QUIT DURING PREGNANCY (49.5%, SD=8.0 VERSUS 46.6%, SD=5.6 AND 45.8%, SD=6.3, RESPECTIVELY; P=0.0002). THE SMOKING-RELATED INCREASE IN METHYLATION WAS MOST PRONOUNCED IN MALE OFFSPRING (P FOR SEX INTERACTION=0.03), FOR WHOM APPROXIMATELY 20% OF SMOKING-RELATED LOW BIRTH WEIGHT WAS MEDIATED BY DNA METHYLATION AT THE IGF2 DMR. OUR FINDINGS SUGGEST THAT IGF2 DMR PLASTICITY IS AN IMPORTANT MECHANISM BY WHICH IN UTERO ADJUSTMENTS TO ENVIRONMENTAL TOXICANTS ARE CONFERRED. LARGER STUDIES TO REPLICATE THESE FINDINGS ARE REQUIRED.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
16  3817  24 INTRAUTERINE PROGRAMMING OF THE ENDOCRINE PANCREAS. EPIDEMIOLOGICAL STUDIES HAVE REVEALED STRONG RELATIONSHIPS BETWEEN POOR FOETAL GROWTH AND SUBSEQUENT DEVELOPMENT OF THE METABOLIC SYNDROME. PERSISTING EFFECTS OF EARLY MALNUTRITION BECOME TRANSLATED INTO PATHOLOGY, THEREBY DETERMINE CHRONIC RISK FOR DEVELOPING GLUCOSE INTOLERANCE AND DIABETES. THESE EPIDEMIOLOGICAL OBSERVATIONS IDENTIFY THE PHENOMENA OF FOETAL PROGRAMMING WITHOUT EXPLAINING THE UNDERLYING MECHANISMS THAT ESTABLISH THE CAUSAL LINK. ANIMAL MODELS HAVE BEEN ESTABLISHED AND STUDIES HAVE DEMONSTRATED THAT REDUCTION IN THE AVAILABILITY OF NUTRIENTS DURING FOETAL DEVELOPMENT PROGRAMS THE ENDOCRINE PANCREAS AND INSULIN-SENSITIVE TISSUES. WHATEVER THE TYPE OF FOETAL MALNUTRITION, WHETHER THERE ARE NOT ENOUGH CALORIES OR PROTEIN IN FOOD OR AFTER PLACENTAL DEFICIENCY, MALNOURISHED PUPS ARE BORN WITH A DEFECT IN THEIR BETA-CELL POPULATION THAT WILL NEVER COMPLETELY RECOVER, AND INSULIN-SENSITIVE TISSUES WILL BE DEFINITIVELY ALTERED. DESPITE THE SIMILAR ENDPOINT, DIFFERENT CELLULAR AND PHYSIOLOGICAL MECHANISMS ARE PROPOSED. HORMONES OPERATIVE DURING FOETAL LIFE LIKE INSULIN ITSELF, INSULIN-LIKE GROWTH FACTORS AND GLUCOCORTICOIDS, AS WELL AS SPECIFIC MOLECULES LIKE TAURINE, OR ISLET VASCULARIZATION WERE IMPLICATED AS POSSIBLE FACTORS AMPLIFYING THE DEFECT. THE MOLECULAR MECHANISMS RESPONSIBLE FOR INTRAUTERINE PROGRAMMING OF THE BETA CELLS ARE STILL ELUSIVE, BUT TWO HYPOTHESES RECENTLY EMERGED: THE FIRST ONE IMPLIES PROGRAMMING OF MITOCHONDRIA AND THE SECOND, EPIGENETIC REGULATION.	2007	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
17  5253  47 PROGRAMMING CHANGES OF HIPPOCAMPAL MIR-134-5P/SOX2 SIGNAL MEDIATE THE SUSCEPTIBILITY TO DEPRESSION IN PRENATAL DEXAMETHASONE-EXPOSED FEMALE OFFSPRING. DEPRESSION IS A NEUROPSYCHIATRIC DISORDER AND HAS INTRAUTERINE DEVELOPMENTAL ORIGINS. THIS STUDY AIMED TO CONFIRM THE DEPRESSION SUSCEPTIBILITY IN OFFSPRING RATS INDUCED BY PRENATAL DEXAMETHASONE EXPOSURE (PDE) AND TO FURTHER EXPLORE THE INTRAUTERINE PROGRAMMING MECHANISM. WISTAR RATS WERE INJECTED WITH DEXAMETHASONE (0.2 MG/KG.D) SUBCUTANEOUSLY DURING THE GESTATIONAL DAYS 9-20 AND PART OF THE OFFSPRING WAS GIVEN CHRONIC STRESS AT POSTNATAL WEEKS 10-12. BEHAVIORAL RESULTS SHOWED THAT THE ADULT PDE FEMALE OFFSPRING WAS SUSCEPTIBLE TO DEPRESSION, ACCOMPANIED BY INCREASED HIPPOCAMPAL MIR-134-5P EXPRESSION AND DECREASED SEX-DETERMINING REGION Y-BOX 2 (SOX2) EXPRESSION, AS WELL AS DISORDERS OF NEURAL PROGENITOR CELLS PROLIFERATION AND HIPPOCAMPAL NEUROGENESIS. THE PDE FEMALE FETAL RATS PRESENTED CONSISTENT CHANGES WITH THE ADULT OFFSPRING, ACCOMPANIED BY THE UPREGULATION OF GLUCOCORTICOID RECEPTOR (GR) EXPRESSION AND DECREASED SIRTUIN 1 (SIRT1) EXPRESSION. WE FURTHER FOUND THAT THE H3K9AC LEVEL OF THE MIR-134-5P PROMOTER WAS SIGNIFICANTLY INCREASED IN THE PDE FETAL HIPPOCAMPUS, AS WELL AS IN ADULT OFFSPRING BEFORE AND AFTER CHRONIC STRESS. IN VITRO, THE CHANGES OF GR/SIRT1/MIR-134-5P/SOX2 SIGNAL BY DEXAMETHASONE WERE CONSISTENT WITH IN VIVO EXPERIMENTS, WHICH COULD BE REVERSED BY GR RECEPTOR ANTAGONIST, SIRT1 AGONIST, AND MIR-134-5P INHIBITOR. THIS STUDY CONFIRMED THAT PDE LED TO AN INCREASED EXPRESSION LEVEL AS WELL AS H3K9AC LEVEL OF MIR-134-5P BY ACTIVATING THE GR/SIRT1 PATHWAY IN THE FETAL HIPPOCAMPUS AND THEN INHIBITED THE SOX2 EXPRESSION. THE PROGRAMMING EFFECT MEDIATED BY THE ABNORMAL EPIGENETIC MODIFICATION COULD LAST FROM INTRAUTERINE TO ADULTHOOD, WHICH CONSTITUTES THE INTRAUTERINE PROGRAMMING MECHANISM LEADING TO HIPPOCAMPAL NEUROGENESIS DISORDERS AND DEPRESSION SUSCEPTIBILITY IN FEMALE OFFSPRING. INTRAUTERINE PROGRAMMING MECHANISM FOR THE INCREASED DEPRESSIVE SUSCEPTIBILITY IN ADULT FEMALE OFFSPRING BY PRENATAL DEXAMETHASONE EXPOSURE (PDE). GR, GLUCOCORTICOID RECEPTOR; SIRT1, SIRTUIN 1; SOX2, SEX-DETERMINING REGION Y-BOX 2; NPCS, NEUROPROGENITOR CELLS; H3K9AC, HISTONE 3 LYSINE 9 ACETYLATION; GRE, GLUCOCORTICOID RESPONSE ELEMENT.	2022	

18   649  30 BIRTHWEIGHT, MATERNAL WEIGHT TRAJECTORIES AND GLOBAL DNA METHYLATION OF LINE-1 REPETITIVE ELEMENTS. LOW BIRTHWEIGHT, PREMATURE BIRTH, INTRAUTERINE GROWTH RETARDATION, AND MATERNAL MALNUTRITION HAVE BEEN RELATED TO AN INCREASED RISK OF CARDIOVASCULAR DISEASE, TYPE 2 DIABETES MELLITUS, OBESITY, AND NEUROPSYCHIATRIC DISORDERS LATER IN LIFE. CONVERSELY, HIGH BIRTHWEIGHT HAS BEEN LINKED TO FUTURE RISK OF CANCER. GLOBAL DNA METHYLATION ESTIMATED BY THE METHYLATION OF REPETITIVE SEQUENCES IN THE GENOME IS AN INDICATOR OF SUSCEPTIBILITY TO CHRONIC DISEASES. WE USED DATA AND BIOSPECIMENS FROM AN EPIGENETIC BIRTH COHORT TO EXPLORE THE ASSOCIATION BETWEEN TRAJECTORIES OF FETAL AND MATERNAL WEIGHT AND LINE-1 METHYLATION IN 319 MOTHER-CHILD DYADS. NEWBORNS WITH LOW OR HIGH BIRTHWEIGHT HAD SIGNIFICANTLY LOWER LINE-1 METHYLATION LEVELS IN THEIR CORD BLOOD COMPARED TO NORMAL WEIGHT INFANTS AFTER ADJUSTING FOR GESTATIONAL AGE, SEX OF THE CHILD, MATERNAL AGE AT DELIVERY, AND MATERNAL SMOKING DURING PREGNANCY (P = 0.007 AND P = 0.036, RESPECTIVELY), BUT THE MAGNITUDE OF THE DIFFERENCE WAS SMALL. INFANTS BORN PREMATURELY ALSO HAD LOWER LINE-1 METHYLATION LEVELS IN CORD BLOOD COMPARED TO TERM INFANTS, AND THIS DIFFERENCE, THOUGH SMALL, WAS STATISTICALLY SIGNIFICANT (P = 0.004). WE DID NOT FIND IMPORTANT ASSOCIATIONS BETWEEN MATERNAL PREPREGNANCY BMI OR GESTATIONAL WEIGHT GAIN AND GLOBAL METHYLATION OF THE CORD BLOOD OR FETAL PLACENTAL TISSUE. IN CONCLUSION, WE FOUND SIGNIFICANT DIFFERENCES IN CORD BLOOD LINE-1 METHYLATION AMONG NEWBORNS WITH LOW AND HIGH BIRTHWEIGHT AS WELL AS AMONG PREMATURELY BORN INFANTS. FUTURE STUDIES MAY ELUCIDATE WHETHER CHROMOSOMAL INSTABILITIES OR OTHER FUNCTIONAL CONSEQUENCES OF THESE CHANGES CONTRIBUTE TO THE INCREASED RISK OF CHRONIC DISEASES AMONG INDIVIDUALS WITH THESE CHARACTERISTICS.	2011	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
19  3816  44 INTRAUTERINE PROGRAMMING OF CARTILAGINOUS 11BETA-HSD2 INDUCED BY CORTICOSTERONE AND CAFFEINE MEDIATED SUSCEPTIBILITY TO ADULT OSTEOARTHRITIS. OUR PREVIOUS STUDY REPORTED THAT PRENATAL CAFFEINE EXPOSURE (PCE) COULD INDUCE CHONDRODYSPLASIA AND INCREASE THE SUSCEPTIBILITY TO OSTEOARTHRITIS IN OFFSPRING RATS. HOWEVER, THE POTENTIAL MECHANISMS AND INITIATING FACTORS REMAIN UNKNOWN. THIS STUDY AIMS TO INVESTIGATE WHETHER 11BETA-HSD2, A GLUCOCORTICOID-METABOLIZING ENZYME, IS INVOLVED IN THE SUSCEPTIBILITY OF OSTEOARTHRITIS INDUCED BY PCE AND TO FURTHER EXPLORE ITS POTENTIAL MECHANISMS AND INITIATING FACTORS. FIRSTLY, WE FOUND THAT PCE REDUCED CARTILAGE MATRIX SYNTHESIS (AGGRECAN/COL2A1 EXPRESSION) IN MALE ADULT OFFSPRING RATS AND EXHIBITED AN OSTEOARTHRITIS PHENOTYPE FOLLOWING CHRONIC STRESS, WHICH WAS ASSOCIATED WITH PERSISTENTLY REDUCED H3K9AC AND H3K27AC LEVELS AT THE PROMOTER OF 11BETA-HSD2 AS WELL AS ITS EXPRESSION IN THE CARTILAGE FROM FETUS TO ADULTHOOD. THE EXPRESSION OF 11BETA-HSD2, AGGRECAN AND COL2A1 WERE ALL DECREASED BY CORTICOSTERONE IN THE FETAL CHONDROCYTES, WHILE OVEREXPRESSION OF 11BETA-HSD2 COULD PARTIALLY ALLEVIATE THE DECREASE OF MATRIX SYNTHESIS INDUCED BY CORTICOSTERONE IN VITRO. FURTHERMORE, THE GLUCOCORTICOID RECEPTOR (GR) ACTIVATED BY GLUCOCORTICOIDS DIRECTLY BONDED TO THE PROMOTER REGION OF 11BETA-HSD2 TO INHIBIT ITS EXPRESSION. MEANWHILE, THE ACTIVATED GR REDUCED THE H3K9AC AND H3K27AC LEVELS OF 11BETA-HSD2 BY RECRUITING HDAC4 AND PROMOTING GR-HDAC4 PROTEIN INTERACTION TO INHIBIT THE 11BETA-HSD2 EXPRESSION. MOREOVER, CAFFEINE COULD REDUCE THE EXPRESSION OF 11BETA-HSD2 BY INHIBITING THE CAMP/PKA SIGNALING PATHWAY BUT WITHOUT REDUCING THE H3K9AC AND H3K27AC LEVELS OF 11BETA-HSD2, THEREBY SYNERGISTICALLY ENHANCING THE CORTICOSTERONE EFFECT. IN CONCLUSION, THE PERSISTENTLY REDUCED H3K9AC AND H3K27AC LEVELS OF 11BETA-HSD2 FROM FETUS TO ADULTHOOD MEDIATED THE INHIBITION OF CARTILAGE MATRIX SYNTHESIS AND THE INCREASED SUSCEPTIBILITY TO OSTEOARTHRITIS. THIS EPIGENETIC PROGRAMMING CHANGE IN UTERO WAS INDUCED BY GLUCOCORTICOIDS WITH SYNERGISTIC EFFECT OF CAFFEINE.	2022	
                                                                                                                                                                                                                     
20  4752  31 NOVEL ROLE OF GESTATIONAL HYDRALAZINE IN LIMITING MATERNAL AND DIETARY OBESITY-RELATED CHRONIC KIDNEY DISEASE. BACKGROUND: MATERNAL OBESITY IS A RISK FACTOR FOR CHRONIC KIDNEY DISEASE (CKD) IN OFFSPRING, UNDERPINNING THE THEORY OF THE DEVELOPMENTAL ORIGINS OF HEALTH AND DISEASE. DNA METHYLATION HAS BEEN IMPLICATED IN THE PROGRAMMING OF ADULT CHRONIC DISEASE BY MATERNAL OBESITY, THEREFORE, DNA DEMETHYLATING AGENTS MAY MITIGATE OFFSPRING RISK OF DISEASE. IN RODENT MODELS, LOW-DOSE HYDRALAZINE HAS PREVIOUSLY BEEN SHOWN TO REDUCE RENAL FIBROSIS VIA DNA DEMETHYLATION. WE USED MOUSE MODELS OF MATERNAL OBESITY AND OFFSPRING OBESITY TO DETERMINE WHETHER ADMINISTRATION OF LOW-DOSE HYDRALAZINE DURING GESTATION CAN PREVENT FETAL PROGRAMMING OF CKD IN OFFSPRING. METHODS: FEMALE C57BL/6 MICE RECEIVED HIGH FAT DIET (HFD) OR CHOW PRIOR TO MATING, DURING GESTATION AND LACTATION. DURING GESTATION, DAMS RECEIVED SUBCUTANEOUS HYDRALAZINE (5 MG/KG) OR SALINE THRICE-WEEKLY. MALE OFFSPRING WEANED TO HFD OR CHOW, WHICH CONTINUED UNTIL ENDPOINT AT 32 WEEKS. BIOMETRIC AND METABOLIC PARAMETERS, RENAL GLOBAL DNA METHYLATION, RENAL FUNCTIONAL AND STRUCTURAL CHANGES, AND RENAL MARKERS OF FIBROSIS, INFLAMMATION AND OXIDATIVE STRESS WERE ASSESSED AT ENDPOINT. RESULTS: OFFSPRING EXPOSED TO MATERNAL OBESITY OR DIET-INDUCED OBESITY HAD SIGNIFICANTLY INCREASED RENAL GLOBAL DNA METHYLATION, TOGETHER WITH OTHER ADVERSE RENAL EFFECTS INCLUDING ALBUMINURIA, GLOMERULOSCLEROSIS, RENAL FIBROSIS, AND OXIDATIVE STRESS. OFFSPRING EXPOSED TO GESTATIONAL HYDRALAZINE HAD SIGNIFICANTLY REDUCED RENAL GLOBAL DNA METHYLATION. IN OBESE OFFSPRING OF OBESE MOTHERS, GESTATIONAL HYDRALAZINE SIGNIFICANTLY DECREASED ALBUMINURIA, GLOMERULOSCLEROSIS, AND SERUM CREATININE. OBESE OFFSPRING OF HYDRALAZINE-TREATED LEAN MOTHERS DISPLAYED REDUCED MARKERS OF RENAL FIBROSIS AND OXIDATIVE STRESS. CONCLUSION: GESTATIONAL HYDRALAZINE DECREASED RENAL GLOBAL DNA METHYLATION AND EXERTED RENOPROTECTIVE EFFECTS IN OFFSPRING. THIS SUPPORTS A POTENTIAL THERAPEUTIC EFFECT OF HYDRALAZINE IN PREVENTING MATERNAL OBESITY OR DIETARY OBESITY-RELATED CKD, THROUGH AN EPIGENETIC MECHANISM.	2021